218 ELEMENTARY BIOLOGY. [XIII. 



to each side so as to lay bare the parts beneath it ; 

 in turning it back note the loose bands and fibres 

 {subcutaneous areolar tissue) with large lymph-spaces 

 between them, which unite the skin to subjacent 

 parts, and which have to be cut through. 



A number of muscles will now be exposed on the 

 front of the thigh and leg. 



2. The superficial muscles on the front of the thigh. 



Separate these gently from one another, tearing 

 through the connective tissue which unites them. 



a. Each is chiefly made up of a mass^ the helly of 

 the muscle, which is nearly white and readily 

 tears into bundles in a muscle which has been in 

 spirit ; but is softer, redder, and does, not so easily 

 split up in a fresh muscle. 



h. At both ends, in most cases, the belly is replaced 

 by dense shiny tissue forming a tendon. 



c. The tendons are fixed directly or indirectly to 

 some of the neighbouring bones, the less move- 

 able attachment being the origin of the muscles ; 

 the point of attachment to the more moveable 

 bone, its insertion. 



d. The names of the muscles laid bare on the front 

 of the thigh, are — 



a. The sartorius: a thin flat riband-like muscle 

 running down the middle ; it arises from the 

 symphysis pubis and is inserted into a tendi- 

 nous expansion {apoji&urosis) on the inner side 

 of the knee-joint. 



/3. The adductor magnus: it becomes superficial 

 along the upper two-thirds of the inner border 

 of the sartorius. 



